diff --git a/crypto/aes/aes.h b/crypto/aes/aes.h
index 8294a41a3..da067f4a8 100644
--- a/crypto/aes/aes.h
+++ b/crypto/aes/aes.h
@@ -100,7 +100,7 @@ void AES_ofb128_encrypt(const unsigned char *in, unsigned char *out,
 	unsigned char *ivec, int *num);
 void AES_ctr128_encrypt(const unsigned char *in, unsigned char *out,
 	const unsigned long length, const AES_KEY *key,
-	unsigned char counter[AES_BLOCK_SIZE],
+	unsigned char ivec[AES_BLOCK_SIZE],
 	unsigned char ecount_buf[AES_BLOCK_SIZE],
 	unsigned int *num);